MB5X Grinding Mill

MB5X Pendulous Hanging Grinding Mill represents the most advanced grinding processing technology. The brand-new structural design ;

Hammer Mill

Hammer Mill is specially designed for coarse powder grinding and small size of sand production. Hammer Mill adopts some principles of crusher. Because of its special design,…

Ball Mill

Ball mill has been used in many industries for a long time, the technology is quite mature already. But there are still some problems, such as, lots of investors expressed…

MTM Series Trapezium Mill

Raymond mill is ever one classic powder grinding machine in the past. And most of modern mill are from it and MTM series milling machine is the most successful one. It optimized…

LM Vertical Roller Mill

Vertical Roller Mill is our newly-launched product which is applied as a solution to the technical issues such as low output and high energy consumption in the ordinary industry.…

MTW Series Trapezium Mill

MTW Series European Trapezium Grinding Mill (MTW Raymond Mill) is developed on the basis of our experts' long-term R & D experience, structure & performance analyses of traditional…

Telescope Mirror Blanks / TelescopeMirrorBlanks ...

Construction and Design. Parsons improved the techniques of casting, grinding and polishing large telescope mirrors from speculum metal, and constructed steam-powered grinding machines for parabolic mirrors.His 3 feet (91 cm) mirror of 1839 was cast in smaller pieces, fitted together before grinding and polishing; its 1840 successor was cast in a single piece.

Mirror-o-Matic mirror making machine - ATM pages of ...

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Mirror Grinding Machine | Hackaday

As often in sciences and technology, Leonardo da Vinci was a pioneer, creating machines for the production of optical devices. Indeed, between 1513 and 1517, he imagined machines to grind and polish telescope mirrors, which, at the time, were made of bronze.

Telescope Mirrors, Blanks, Secondaries, Grinding Materials ...

Nov 16, 2018· Types of mirror grinding machines - posted in ATM, Optics and DIY Forum: Hi to all, I am planning to make a mirror grinding and polishing machine but i have limited knowledge about these machines. Because of this i have some questions to someone who has some experience with those machines; - Some machines have fixed supportes and some of them have a prestaltic moving arm, …

Joy of Mirror Making: Rough Grinding

Nov 16, 2018· Types of mirror grinding machines - posted in ATM, Optics and DIY Forum: Hi to all, I am planning to make a mirror grinding and polishing machine but i have limited knowledge about these machines. Because of this i have some questions to someone who has some experience with those machines; - Some machines have fixed supportes and some of them have a prestaltic moving arm, …

Rough Grinding a 20" Quartz Telescope Mirror on the Fixed ...

A telescope mirror is designed to form a diffraction limited image of a point source. Ideally, a certain percentage of the light in the image will fall within the diffraction disk diameter. The Strehl ratio compares the mirror's actual performance in terms of its ability to …

Stellafane ATM: Grits, Polish & Pitch

Jul 21, 2006· While it's true that the aluminized surface of a telescope mirror will deteriorate over time, there is no hard and fast rule about how long this will take. Some coatings last only a few years, while others will outlast you. Indeed, the coating on my very first reflector telescope looks absolutely perfect in spite of being more than 30 years old.

Newport Glass Works, LTD. Grinding, Polishing and Figuring ...

Grinding Machine for Large Telescope Mirrors. I designed and built a grinding machine for mirrors up to 42 inches [1.1m] in diameter. By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work. The machine can also work smaller mirrors if the drip pan is moved to the fast shaft on ...

Telescope Products & Services - Galvoptics

Jun 05, 2009· This machine can grind and polish using different stroke patterns, i.e. w-stroke, short strokes, long strokes, etc. Currently this machine can only operate a mirror/lens up to ~250mm size glass. I keep the lens/mirror in a bath with a pump to agitate the water and cerium oxide or whatever I happen to be grinding/polishing with.

How will you know when you telescope mirrors need re ...

Telescope Mirror Blanks Providing telescope mirror blanks and kits to telescope makers. Mirror blanks are individually tested for internal strain. Plastic protractor inserted under a 6 inch mirror blank during a stress test, to illustrate what stress would look like - if there were any present.

The Telescopes at RFO

Here at OPT, we know how long and complex a process it can be to hand pick every single component of your astronomy setup to go perfectly with your telescope. Thats why we offer a wide variety of telescope kits to do the hard work for you! We have a wide array of pre-prepared kits available for use, centered around various high quality telescopes.

Mike's Telescope Workshop

We are your source for astronomy telescopes, eyepieces, astroimaging cameras, and more! Browse an extensive selection of astronomy equipment at Telescopes.

Types of mirror grinding machines - ATM, Optics and DIY ...

As often in sciences and technology, Leonardo da Vinci was a pioneer, creating machines for the production of optical devices. Indeed, between 1513 and 1517, he imagined machines to grind and polish telescope mirrors, which, at the time, were made of bronze.

Telescope-Making-Supplies-vcsm - Scientific Mirrors

The November 1974 issue of Sky & Telescope (page 325) carried an article by Eric G.H. Mobsby of Blandford Forum, Dorset, England, describing a method of testing medium and long focus mirrors with a special inverse grating that can be interpreted with the ease of a Null Test. Robert A. Cox, then Co-editor of the Gleanings for ATM's column ...

Grinding Machine for Large Telescope Mirrors

Jul 08, 2013· telescope mirror grinding / polishing machine with tachometer - Duration: 1:34. Florin Andrei Recommended for you. 1:34. DIY CNC Router for Under $900 - Free Plans Available - …

How will you know when you telescope mirrors need re ...

want to learn more about Newtonian telescopes the internet is replete with information about all types of telescopes. Typically, the primary mirror is made of glass. Pyrex is commonly used for the primary mirror because of its thermal stability, but for small mirrors, plate glass will work fine too. Telescope mirrors are relatively thick.

Telescope-Making-Supplies-vcsm - Scientific Mirrors

Rough Grinding The first milestone is putting a curve into the mirror face. The curve's depth dictates the mirror's focal length. The curve should be spherical. Creating the curve can be done by several methods: The curve is ground into the mirror face using a grinding tool. The curve is pre-generated for you.

Amateur Telescope Making Main Page - Stellafane

The telescope mirror was purchased from Jeff Baldwin. The Project 40 team finished rough grinding, fine grinding, polishing and figuring the hand-built polishing machine. Optical testing used a large zone mask for initial figuring and two years of interferometric measurements and figuring to …

Amazon: telescope mirrors

Rough grinding powders for grinding mirrors to the required curve starting with flat (non diamond generated) mirror blank and grinding tool. Three grades of coarse grinding powders are listed below. ... ( CATS) telescope making group. Here is a link to the 'Sky at Night' magazine's Telscope Making Video by two members of CATS.

Leviathan of Parsonstown - Wikipedia

Sep 26, 2006· The true test of the amateur astronomer is building their own telescope. Grinding and polishing your own mirrors is a long, arduous process. Instead of …

Telescope Grinding - YouTube

Mirror-O-Matic grinding machine. When I decided in 2009 after a ten-year break to get into mirror making again, it quickly became clear to me that I would need to construct machine, as hand grinding big mirrors is not something very beneficial for the hands of a musician.

Document sans nom - Astrosurf

Mar 07, 2010· This video shows how to setup a mirror grinding machine for fixed-post grinding, also known as spin grinding or spinning. After setup, you'll see how abrasive and water are applied, and how the ...

Building a fixed post mirror grinding machine ...

Aug 19, 2019· A few years ago, I was thinking about hand grinding a mirror. I watched a YouTube video of John Dobson hand grinding a mirror. I don't really remember how big it was, but it was big. Maybe 14". Maybe larger. John was no youngster in this video and even though he is a master, he sure put a hellova lot of labor into that mirror.

tut44 Making A Mirror Grinding Tool - Asterism

Thin Telescope Mirrors . Abridged from an article appearing in Telescope Making #12 Provided: Courtesy of Astronomy Magazine Article's Author: Bob Kestner . Part I - Grinding . For many years, amateur astronomers and telescope makers thought it essential that glass for telescope primary mirrors be at least one-sixth as thick as its diameter.

Build your own telescope part 1: The mirror – Thomas ...

Mel Bartels, a well respected west coast amateur, recommends on his Large, Thin Mirror Grinding web page starting with something between 30 and 60 grit, and then 120, 220, 500 (=25 micron) and finishing with 9 micron. This is just a 5 grit sequence, as opposed to 8 to 10 for the more traditional sequences usually recommended for novices.